A simplified relativistic configuration interaction method is used to study the dielectronic satellite transition processes,in which the whole high-n dielectronic satellite transition processes can be treated convenie...
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A simplified relativistic configuration interaction method is used to study the dielectronic satellite transition processes,in which the whole high-n dielectronic satellite transition processes can be treated conveniently in the frame of quantum defect *** theoretical results for heliumlike iron are in good agreement with the experimental measurements.
In the report,the recently developed relativistic multichannel theory(RMCT)is a full relativistic non-perturbative method and can be applied to the high-Z atomic ions which have given rise to some recent interests bec...
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In the report,the recently developed relativistic multichannel theory(RMCT)is a full relativistic non-perturbative method and can be applied to the high-Z atomic ions which have given rise to some recent interests because of researches of inertial confinement fusion and x-ray *** on the RMCT,the positions and widths of doubly excited sp2n^(+),sp2n^(-),and 2pnd ^(1)P_(1) resonances are calculated,which are in agreement with the recent experimental *** sets up a sound foundation on which the RMCT should be applicable to high Z atomic ions.
In the frame of quantum defect theory,the state-testate dielectronic recombination rate coefficients of Fe^(25+) ion are calculated by a simple relativistic configuration interaction *** calculated results are further...
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In the frame of quantum defect theory,the state-testate dielectronic recombination rate coefficients of Fe^(25+) ion are calculated by a simple relativistic configuration interaction *** calculated results are further expressed with a two-parameter fitting formula,and then the dependence of fitting parameters on radiative decay final channel is studied.
The aim of the present work is to generalize the method introduced by Güémez et al.[***.E52(1995)R2145]Using feedback scheme,two systems can be synchronized by signals or variables which come from the drivin...
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The aim of the present work is to generalize the method introduced by Güémez et al.[***.E52(1995)R2145]Using feedback scheme,two systems can be synchronized by signals or variables which come from the driving ***,it is possible for the systems to be synchronized by different driving signals which come from the third or fourth *** the unmasking procedure becomes more *** simulations are given.
The ground state properties of deformed nuclei of C isotope are investigated by the Skyrme-Hartree-Fock theory with new force parameters SKI4 of Reinhard and Flocard[***.A 584(1995)467].Calculations show that the defo...
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The ground state properties of deformed nuclei of C isotope are investigated by the Skyrme-Hartree-Fock theory with new force parameters SKI4 of Reinhard and Flocard[***.A 584(1995)467].Calculations show that the deformed-Skyrme-Hartree-Fock theory with above force parameters provides a good description on the binding energy,the various radii and deformation parameters of C *** figure of the evolution of deformation for whole C isotope chain is plotted.A detailed discussion on numerical results is provided in the paper.
A stiff one-armed swimmer in glycerine goes nowhere. However, if its arm is elastic, the swimmer can go on its way. Quantifying this observation, we study a hyperdiffusion equation for the shape of the elastica in a v...
A stiff one-armed swimmer in glycerine goes nowhere. However, if its arm is elastic, the swimmer can go on its way. Quantifying this observation, we study a hyperdiffusion equation for the shape of the elastica in a viscous fluid, find solutions for impulsive or oscillatory forcing, and elucidate relevant aspects of propulsion. These results have application in a variety of physical and biological contexts, from dynamic experiments measuring biopolymer bending moduli to instabilities of twisted elastic filaments.
A lattice Boltzmann model for multicomponent fluid flows is used to simulate the two-dimensional Rayleigh-Taylor instability. The dynamical processes of the instability, varying from linear growth to mixing, have been...
A lattice Boltzmann model for multicomponent fluid flows is used to simulate the two-dimensional Rayleigh-Taylor instability. The dynamical processes of the instability, varying from linear growth to mixing, have been simulated. The results agree with experiments, analytical studies, and other numerical simulations.
We analyze a quantum observable f given by the time average of a dynamical variable F along a Feynman path. We show that f can be described by a (generalized) wave function satisfying the Schrödinger-like equatio...
We analyze a quantum observable f given by the time average of a dynamical variable F along a Feynman path. We show that f can be described by a (generalized) wave function satisfying the Schrödinger-like equation and measured by a meter similar to that of von Neumann. A connection with operators is established. Examples include the particle’s momentum, energy and the fractional traversal time.
Exploiting the “natural” frame of space curves, we formulate an intrinsic dynamics of a twisted elastic filament in a viscous fluid. Coupled nonlinear equations describing the temporal evolution of the filament'...
Exploiting the “natural” frame of space curves, we formulate an intrinsic dynamics of a twisted elastic filament in a viscous fluid. Coupled nonlinear equations describing the temporal evolution of the filament's complex curvature and twist density capture the dynamic interplay of twist and writhe. These equations are used to illustrate a remarkable nonlinear phenomenon: geometric untwisting of open filaments, whereby twisting strains relax through a transient writhing instability without axial rotation. Experimentally observed writhing motions of fibers of the bacterium B. subtilis [N. H. Mendelson et al., J. Bacteriol. 177, 7060 (1995)] may be examples of this untwisting process.
The geometric phases of the cyclic states of a generalized harmonic oscillator with nonadiabatic time-periodic parameters are discussed in the framework of a squeezed state. A class of cyclic states is expressed as a ...
The geometric phases of the cyclic states of a generalized harmonic oscillator with nonadiabatic time-periodic parameters are discussed in the framework of a squeezed state. A class of cyclic states is expressed as a superposition of an infinite number of squeezed states. Then their geometric phases are obtained explicitly and found to be −(n+1/2) times the classical nonadiabatic Hannay angle. It is shown that the analysis based on the squeezed state approach provides a clear picture of the geometric meaning of the quantal phase.
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